Lady Susan is an epistolary novella by Jane Austen. Lady Susan Vernon, a beautiful and charming recent widow, visits her brother-in-law and his wife, Charles and Catherine Vernon, with little advance notice at Churchill, their country residence. Catherine is far from pleased, as Lady Susan had tried to prevent her marriage to Charles and her unwanted guest has been described to her as "the most accomplished coquette in England". Among Lady Susan's conquests is the married Mr. Manwaring.

Jane Austen (16 December 1775 - 18 July 1817) was an English novelist known primarily for her six major novels, which interpret, critique, and comment upon the British landed gentry at the end of the 18th century. Austen's plots often explore the dependence of women on marriage in the pursuit of favourable social standing and economic security.